[Bug c++/64870] value not set via reference

["conradsand.arma at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64870

--- Comment #6 from Conrad <conradsand.arma at gmail dot com> ---
(In reply to Andrew Pinski from comment #5)
> No, that is not how C++ defines it.  As mentioned before C++ does not define
> the order of the execution of the operands.

I agree this is not how C++ defines it. At the same time, changing the order
from left-to-right "just because we can" is not a good strategy either,
especially for iostreams.

> There is no wtf moments.  This is not Java which has well defined behavior
> :).

Ha :-)  I'd still like to see some concrete benchmarks to support re-ordering. 
Otherwise it can be argued that the re-ordering is actually counter productive,
given its unintuitive behaviour.

Given a choice between gcc and clang, I'd pick clang because it's simply better
behaved.  This is not to dismiss the great effort put into gcc, but
user-friendliness is important.